A dictionary entry from Knight's American Mechanical Dictionary describing the opening machine used to loosen tussocks of baled cotton and remove dust and offal before further processing. It lists alternate names (willy, devil, scutcher, blower, spreader) and explains the spiked wooden drum, wire-gauze lower section, feed-cloth and nipping rollers, with operating speed and output. An engraved cross-section diagram (Fig. 3401) accompanies the text.